Meaning of VERNIER in English
or vernier caliper
Instrument for making very accurate linear or angular measurements.
Introduced in 1631 by Pierre Vernier (с 1580–1637), it uses two graduated scales: a main scale similar to that on a ruler, and a specially graduated scale, the vernier, that slides parallel to the main scale and enables readings to be made to a fraction of a division on the main scale.
Britannica English dictionary. Английский словарь Британика. 2012